The phrase "a study has reported" is correct and usable in written English.
You can use it when referring to findings or conclusions drawn from a research study.
Example: "A study has reported significant improvements in patient outcomes after the new treatment was implemented."
Alternatives: "research has indicated" or "a study found".
Moreover, a study has reported that NA protein of influenza A/Puerto Rico/8/1934 (H1N1, PR8) can downregulate ACE2 ; therefore, whether NA of H5N1 and H7N9 viruses can downregulate ACE2 requires further investigation.
However, in line with our results, a study has reported a relationship between higher omega-3 index and lower HOMA-IR (a proxy of insulin resistance) in obese children35.
However, there has been no success in establishing human TS cells, albeit a study has reported derivation of stable, proliferating cytotrophoblast stem cells from human ES cells [6].
A study has reported that Mfn2 expression (a key mediator of mitochondrial fusion) is reduced in aged persons [92].
23 Furthermore, a study has reported higher sensory thresholds to rectal distention suggesting altered rectal sensitivity in the elderly.
In fact, a study has reported that during monocyte-macrophage differentiation, expressions of miR-15a and miR-16 were decreased with higher expression of the IKKα [ 30].
Neither Cranney nor Chung required that a study have reported low basal vitamin D status.
Recently, a single study has reported a light/dark discrimination ability in the Zambian mole-rats, Fukomys anselli/kafuensis [22].
A recent study has reported a M. avium prevalence of 11% by culture in Southern Spain [ 23].
However, a Finnish study has reported a higher incidence of 23 per 100,000 person-years (15).
Likewise, a recent study has reported an increased SREBP-1c expression and activity in CF dendritic cells [45].
